Polymer nanocomposite flexible films for electromagnetic interference shielding

A polymer-based thin film, comprising:

• a multilayer fiber matrix comprising a first polymer and a second polymer different from the first polymer;
• and
• nanomaterials incorporated within the multilayer fiber matrix,
• the nanomaterials comprising quantum dots (QDs) and two-dimensional (2D) conducive nanomaterials,
• the polymer-based thin film having a thickness of no more than 100 micrometers (μm),
• the first polymer being a nonconductive polymer and the second polymer being a conductive polymer,
• the polymer-based thin film having an electrical conductivity of at least 300,000 Siemens per meter (S/m),
• the polymer-based thin film having a porosity in a range of from 60% to 80%,
• the QDs being present in the polymer-based thin film in an amount of no more than 1 wt. %,
• the 2D conducive nanomaterials being present in the polymer-based thin film in an amount of no more than 25 wt. %,
• the QDs being magnetic QDs,
• the nanomaterials being incorporated along a radial axis of fibers of the multilayer fiber matrix, and
• the nanomaterials being incorporated by being interspersed between layers of the multilayer fiber matrix.